LED light source photocatalytic tubular reactor and application thereof

Abstract

Disclosed is an LED light source photocatalytic tubular reactor and application thereof. The LED light source photocatalytic tubular reactor comprises an LED light source, a temperature control chamber and a transparent reaction pipeline; the transparent reaction pipeline is located in the temperature control chamber; at least one side of the temperature control chamber is a light-transmitting plate; the LED light source provides a light source for the transparent reaction pipeline through the light-transmitting plate; and the transparent reaction pipeline has a diameter-to-length ratio of the inner diameter to the length of 0-0.1, but not 0. The LED light source continuous photocatalytic tubular reactor of the present disclosure can eliminate the scaling up effect, increase the yield and allow continuous production with an advantage of easy to use and low cost. The tubular reaction device of the present disclosure can also realize automatic control, which can effectively reduce personnel costs and improve production safety.

What is claimed is: 
     
       1. An LED light source photocatalytic tubular reactor, comprising an LED light source, a temperature control chamber and a transparent reaction pipeline;
 wherein the transparent reaction pipeline is coiled and located in the temperature control chamber, wherein a temperature control medium is circulated in the temperature control chamber when in use, or a temperature control pipeline is separately provided in the temperature control chamber; 
 wherein the temperature control chamber has two sides, and each side of the temperature control chamber is a light-transmitting plate; 
 the LED light source is a modular LED light source group, which includes two modular light sources each located on one of the two sides outside of the temperature control chamber, and provides a light source for the transparent reaction pipeline through the light-transmitting plate on each of the two sides; 
 the transparent reaction pipeline has a diameter-to-length ratio of the inner diameter to the length of 0-0.1, but not 0; and 
 
       wherein the transparent reaction pipeline is a plug flow reactor. 
     
     
       2. The LED light source photocatalytic tubular reactor according to  claim 1 , wherein
 each of the two modular LED light sources is located at a distance of 0-5 cm from the light-transmitting plate on one of the two sides outside of the temperature control chamber. 
 
     
     
       3. The LED light source photocatalytic tubular reactor according to  claim 1 , wherein the temperature control medium in the temperature control chamber is ethylene glycol or water. 
     
     
       4. The LED light source photocatalytic tubular reactor according to  claim 1 , further comprising an external flow temperature control system. 
     
     
       5. The LED light source photocatalytic tubular reactor according to  claim 1 , wherein the transparent reaction pipeline is coiled to form a mosquito coil shape or an S shape:
 wherein the temperature control pipeline is separately provided in the temperature control chamber, and the temperature control pipeline and the transparent reaction pipeline are spirally arranged and coiled. 
 
     
     
       6. The LED light source photocatalytic tubular reactor according to  claim 1 , wherein the transparent reaction pipeline is circular pipeline:
 or, the transparent reaction pipeline has a diameter-to-length ratio of the inner diameter to the length of 0-0.0005, but not 0; 
 or, the transparent reaction pipeline has an inner diameter of 0-20 mm, but not 0; 
 or, when in use, the transparent reaction pipeline contains liquid, which has a linear velocity of no more than 3 m/s. 
 
     
     
       7. A photocatalytic reaction device, wherein the photocatalytic reaction device comprises (1) the LED light source photocatalytic tubular reactor according to  claim 1 ; and (2) a raw material tank, a feed pump, a back pressure valve and a product storage tank connected in sequence. 
     
     
       8. The photocatalytic reaction device according to  claim 7 , wherein the photocatalytic reaction device further comprises a plurality of thermocouples. 
     
     
       9. A method for preparing a trifluoromethyl compound or a brominated compound by using the photocatalytic reaction device according to  claim 7 , wherein, the method comprises the following steps:
 S1. continuously supplying reaction raw materials to the transparent reaction pipeline in the photocatalytic reaction device according to  claim 7 ; 
 S2. carrying out photocatalysis to continuously prepare the trifluoromethyl compound or the brominated compound by controlling the reaction temperature using the temperature control chamber under the illumination of the LED light source. 
 
     
     
       10. A method for preparing a trifluoromethyl compound or a brominated compound by using the photocatalytic reaction device according to  claim 8 , wherein, the method comprises the following steps:
 S1. continuously supplying reaction raw materials to the transparent reaction pipeline in the photocatalytic reaction device according to  claim 8 ; 
 S2. carrying out photocatalysis to continuously prepare the trifluoromethyl compound or the brominated compound by controlling the reaction temperature using the temperature control chamber under the illumination of the LED light source. 
 
     
     
       11. The LED light source photocatalytic tubular reactor according to  claim 2 , wherein the LED light source is at a distance of 0-5 mm from the light-transmitting plate. 
     
     
       12. The LED light source photocatalytic tubular reactor according to  claim 5 , wherein the light-transmitting plate has a thickness of 0-20 mm:
 and the temperature control pipeline of the temperature control chamber has an inner diameter of 2-20 mm. 
 
     
     
       13. The LED light source photocatalytic tubular reactor according to  claim 12 , wherein the light-transmitting plate has a thickness of 2-20 mm. 
     
     
       14. The LED light source photocatalytic tubular reactor according to  claim 1 , wherein the transparent reaction pipeline has an inner diameter of 0-5 mm, but not 0. 
     
     
       15. The photocatalytic reaction device according to  claim 8 , wherein the plurality of thermocouples are located in a pipeline connecting the transparent reaction pipeline and the back pressure valve, or, in an external flow temperature control system; and
 a pressure sensor is located in a pipeline connecting the feed pump and the transparent reaction pipeline, or in the external flow temperature control system. 
 
     
     
       16. The photocatalytic reaction device according to  claim 8 , wherein the photocatalytic reaction device comprises three thermocouples. 
     
     
       17. A method for preparing a trifluoromethyl compound or a brominated compound by using the photocatalytic reaction device according to  claim 16 , wherein, the method comprises the following steps:
 S1. continuously supplying reaction raw materials to the transparent reaction pipeline in the photocatalytic reaction device according to  claim 16 ; 
 S2. carrying out photocatalysis to continuously prepare the trifluoromethyl compound or the brominated compound by controlling the reaction temperature using the temperature control chamber under the illumination of the LED light source. 
 
     
     
       18. The LED light source photocatalytic tubular reactor according to  claim 1 , wherein each of the two modular LED light sources is located at a distance of 0-5 mm from the light-transmitting plate on one of the two sides outside of the temperature control chamber. 
     
     
       19. The LED light source photocatalytic tubular reactor according to  claim 1 , wherein the height and width of the modular LED light source group correspond to the area occupied by the transparent reaction pipeline, thereby providing a uniform light source for the transparent reaction pipeline. 
     
     
       20. The LED light source photocatalytic tubular reactor according to  claim 1 , wherein the temperature control medium is circulated in the temperature control chamber when in use. 
     
     
       21. The LED light source photocatalytic tubular reactor according to  claim 1 , wherein the temperature control pipeline is separately provided in the temperature control chamber. 
     
     
       22. An LED light source photocatalytic tubular reactor, comprising an LED light source, a temperature control chamber and a transparent reaction pipeline: wherein:
 the transparent reaction pipeline is a plug flow reactor, which is coiled and located in the temperature control chamber; 
 the temperature control chamber has a cylindrical shape having two sides, wherein each of the two sides of the cylinder is a light-transmitting plate; 
 the LED light source is a modular LED light source group, which includes two modular LED light sources, wherein each of the two modular LED light sources is located at a distance of 0-5 mm from the light-transmitting plate on one of the two sides outside of the temperature control chamber, and provides a light source for the transparent reaction pipeline through the light-transmitting plate on each of the two sides; wherein the height and width of the modular LED light source group correspond to the area occupied by the coiled transparent reaction pipeline, thereby providing a uniform light source for the transparent reaction pipeline; 
 the transparent reaction pipeline has a diameter-to-length ratio of the inner diameter to the length of 0-0.1, but not 0; and 
 wherein a temperature control medium is circulated in the temperature control chamber when in use. 
 
     
     
       23. An LED light source photocatalytic tubular reactor, comprising: an LED light source, a temperature control chamber and a transparent reaction pipeline: wherein:
 the transparent reaction pipeline is a plug flow reactor, which is coiled and located in the temperature control chamber; 
 the temperature control chamber has a cylindrical shape having two sides, wherein each of the two sides of the cylinder is a light-transmitting plate; 
 the LED light source is a modular LED light source group, which includes two modular LED light sources, wherein each of the two modular LED light sources is located at a distance of 0-5 mm from the light-transmitting plate on one of the two sides outside of the temperature control chamber, and provides a light source for the transparent reaction pipeline through the light-transmitting plate on each of the two sides; wherein the height and width of the modular LED light source group correspond to the area occupied by the coiled transparent reaction pipeline, thereby providing a uniform light source for the transparent reaction pipeline; 
 the transparent reaction pipeline has a diameter-to-length ratio of the inner diameter to the length of 0-0.1, but not 0; and 
 wherein a temperature control pipeline is separately provided in the temperature control chamber, and the temperature control pipeline and the transparent reaction pipeline are spirally arranged and coiled.